About the QR code, the code itself can’t tell whether its being scanned or not. I assume the QR code is a URL to a website and the server sends you the notification. So if somebody scanned the QR code and opened the link in their browser but then closed their browser without closing the tab, each time they reopen the browser and the tab automatically refreshes it would seem like a new scan. Even if the URL itself is supposed to forward the user after the notification, some browsers screw up the forwarding process or open the forward address in a new tab, depending on the user settings.

That would be awful for CAD software since they often display part names, which are derived from the file name only in uppercase letters for readability. But Linux doesn’t really have any industry standard CAD software anyway.